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cli: Use anyhow and thiserror for errors

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This patch updates the CLI to use anyhow and thiserror for error
management.  The main feature that our custom `Error` type was providing
was a _list_ of messages, which would allow us to annotate "lower-level"
errors with more contextual information.  This is exactly what's
provided by anyhow's `Context` trait.

(This is setup work for a future PR that will pull the `config` and
`loader` modules out into separate crates; by using `anyhow` we wouldn't
have to deal with a circular dependency between with the new crates.)
This commit is contained in:
Douglas Creager 2021-06-09 12:32:22 -04:00
parent 9d77561c43
commit d2d01e77e3
33 changed files with 237 additions and 419 deletions
Download patch file Download diff file Expand all files Collapse all files

8
cli/src/tests/corpus_test.rs
View file

@ -231,11 +231,10 @@ fn test_feature_corpus_files() {
let expected_message = fs::read_to_string(&error_message_path).unwrap();
if let Err(e) = generate_result {
if e.message() != expected_message {
if e.to_string() != expected_message {
eprintln!(
"Unexpected error message.\n\nExpected:\n\n{}\nActual:\n\n{}\n",
expected_message,
e.message()
expected_message, e
);
failure_count += 1;
}
@ -250,8 +249,7 @@ fn test_feature_corpus_files() {
if let Err(e) = &generate_result {
eprintln!(
"Unexpected error for test grammar '{}':\n{}",
language_name,
e.message()
language_name, e
);
failure_count += 1;
continue;